US3301168A - Quick closure mechanism for the air passage openings of shelters and the like - Google Patents

Quick closure mechanism for the air passage openings of shelters and the like Download PDF

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Publication number
US3301168A
US3301168A US359394A US35939464A US3301168A US 3301168 A US3301168 A US 3301168A US 359394 A US359394 A US 359394A US 35939464 A US35939464 A US 35939464A US 3301168 A US3301168 A US 3301168A
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United States
Prior art keywords
plate
closure
seating
openings
movable
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US359394A
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English (en)
Inventor
Schindler Gottfried
Sauter Karl
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Luwa Ltd
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Luwa Ltd
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    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B13/00—Special devices for ventilating gasproof shelters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/006—Safety valves; Equalising valves, e.g. pressure relief valves specially adapted for shelters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S454/00—Ventilation
    • Y10S454/902—Air raid shelter ventilation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7838—Plural
    • Y10T137/7839—Dividing and recombining in a single flow path
    • Y10T137/784—Integral resilient member forms plural valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7869—Biased open

Definitions

  • Such quick closure mechanisms should guarantee for a sufficiently rapid and effective sealing of the air passage openings of shelters of all types, especially those which should furnish an increased protective action such as command posts, alarm centers, sanitation stations, etc., in order to screen the shelter against air pressure waves resulting from explosions.
  • Valve mechanisms have already been proposed to the art for the closure of the air through passage openings in which an axially displaceable guide rod is mounted in a cylindrical ventilation or aeration opening and which carries at its ends a respective mushroom-shaped closure or cover member.
  • both closure members are located under spring action at the same spacing from the inlet and outlet mouth of the cylindrical ventilation opening or duct, and indeed such that, for the throughflowing air a similar dimensioned cross-section is available between closure member and the relevant mouth as such itself is exhibited by the cylindrical ventilation opening.
  • valve mechanisms require a relatively large closure path, acting unfavorably upon the closure time as well as effecting a large terminal velocity of the cover plate-particularly in consideration of the relatively large moved massesas well as a large impact energy upon the edge of the ventilation opening.
  • a valve is installed within a tube member there is indeed achieved good clos ure times, but there results a bad effect upon the available wall surface as well as high manufacturing costs.
  • ball or globe valves have been proposed which are relatively favorable with regard to flow resistance, yet like the previously mentioned plate valves also exhibit a relatively large closure movement or path. In addition, it is difiicult to maintain the weight of the balls small without them becoming deformed upon impact with the valve seat.
  • the present invention therefore has for one of its primary objects to overcome the disadvantages of the heretofore known devices of the mentioned type and to provide a quick closure mechanism which satisfies the demands and operating requirements placed upon them.
  • the inventive quick closure mechanism is generally characterized by the features that a closure member and a seat or seating portion are constructed as plate-shaped members provided with openings. These members in the closed position bear against one another, whereby the openings of the closure member are displaced or offset with respect to those of the seat portion. Consequently, in the closed position the openings of the closure member lie over the full or uninterrupted plate portions of the seat portion.
  • inventive concepts can be easily developed in such a manner that the explosion wave as well as the subsequent suction wave effective in the opposite direction can effect a quick closing of the ventilation openings.
  • Such quick closure mechanisms designed in accordance with the teachings of the present invention can be manufactured at a very favorable cost in comparison with heretofore known devices.
  • FIGURE 1 is a fragmentary front view of a quick closure mechanism designed according to the present invention as viewed from the shelter interior;
  • FIGURE 2 is a cross-sectional view of the quick closure mechanism depicted in FIGURE 1, taken along the line IIII thereof;
  • FIGURE 3 is a cross-sectional view of the quick closure mechanism depicted in FIGURE 1, taken along the line IIIIII thereof;
  • FIGURE 4 is a cross-sectional view, similar to FIG- URE 2, of a modified form of quick closure mechanism
  • FIGURE 5 is a cross-sectional view of the mechanism depicted in FIGURE 4, taken along the line VV thereof;
  • FIGURE 6 is an enlarged cross-sectional view showing details of a portion of the quick closure mechanism of FIGURE 5;
  • FIGURE 7 is a fragmentary front view of a further embodiment of quick closure mechanism designed according to the teachings of the present invention.
  • FIGURE 8 is a fragmentary front view of a further embodiment of quick closure mechanism designed according to the present invention.
  • FIGURE 9 is a cross-sectional view of the mechanism depicted in FIGURE 8, taken along the line IX-DC thereof;
  • frame portions 2b extend towards one side past the frame slots 17.
  • FIGURE 10 is a fragmentary perspective view of a portion of the quick closure mechanism depicted in FIG- URES 8 and 9.
  • an inner frame 2 composed of the frame portions 2a and 2b is inserted in a wall section 1 possessing for instance quadrilateral or rectangular cross-section ad portions 2a and provide two lateral or sidewise boundaries for the air passage.
  • an intermediate frame 3 spaced from the inner frame 2 is arranged in the wall section 1 and at which joins an outer frame 8 provided with a smaller through passage opening 8a in comparison with the intermediate frame 3.
  • the flat bars 4 can advantageously exhibit a wedge-shaped taper in order to be able to more effectively seal the spacing between the frames 2 and 3.
  • These flat bars 4 partially extend into the opening surrounded by the aforesaid frames and serve as a stop for a seating ,portion or seating element 5 connected by means of screws 6 or similar expedients with such flat bars 4.
  • This arrangement of the flat bars 4 and the base plate or seating element 5 renders it possible to assemble and disassemble the latter from the side of the inner compartment J.
  • the side or face of the seating portion 5 situated opposite the flat bars 4 bears against stop means 21 rigidly connected with the frame portions 2b.
  • a displaceably arranged cover or closure plate bears against shoulders 9 formed by the outer frame 8, closure plate 10 being movable against the force of springs 11 in the direction of the seating portion 5. These springs 11 hear at one end against this closure plate 10 whereas their other ends are seated upon the floor of suitable recesses 12 provided in the seating portion 5.
  • seating portion 5 is provided throughout its entire surface with divided elongated slots 14 closed at the marginal or peripheral sides 14 and by means of which webs or legs 13 are spaced from one another.
  • Webs 13 can be connected with one another through the agency of crossbars or t-russing spaced from the border or periphery 14.
  • the closure plate 10 is constructed in a manner similar to the seating portion 5, and in this case webs or flanges 16 are spaced from one another by The webs 16 in the present instance are arranged and constructed such that when the closure plate 10 contacts the seating portion 5 they completely cover the slots 14 of the aforesaid seating portion.
  • the closure plate- 10 assumes the position illustrated in the drawings, .with the air entrance being schematically indicated by arrow 18.
  • a pressure wave occurs in the direction of arrow 18 such initially impinges against the closure plate 10, whereby the latter is displaced towards the seating portion 5 against the force of the springs 11, this taking place with a large velocity.
  • the recesses or depressions 12 accommodating springs 11 are sufiiciently configured and dimensioned in order to completely receive these springs 11 when in compressed condition.
  • the webs 13 of the seating portion 5 should be so strongly dimensioned that, on the one hand, they are capable of absorbing the impact force of the closure plate 10 and, on the other hand, the peak pressure of an occurring pressure wave Without damage due to fissures, rupture or deformation.
  • the strength or thickness of the webs 16 of the closure plate 10 can be much smaller. These webs 16 are dimensioned such that they will not rupture upon impact of closure plate 10 with seating portion 5. In contradistinction thereto, under certain circumstances it may be desirable that momentary elastic deformation of these webs occur during impact against the seating portion 5 or during appearance of the peak pressure, since by means of the deformation energy a portion of the impact energy and/or the pressure energy of the pressure Wave is destroyed.
  • the small span of the closure plate 10 resulting from the distribution of the total throughpassages into relatively small air slots bounded by the frame 8 additionally renders it possible to provide a relatively small thickness dimension for the closure plate 10. Consequently, the closure plate 10 also exhibits a relatively small mass which is to be accelerated, thereby permitting a correspondingly large closure velocity. Naturally, the closure velocity is also dependent upon the closure path. Due to the distribution of the total air throughpassage crosssection into numerous small passages it is suflicient to maintain at a small value the spacing between the plates 5 and 10 in the illustrated rest position, that is during normal ventilation, without hereby considerably impairing the passage of air.
  • quick closure mechanism or device permits closure times of less than one-hundredths of a second. Indeed, with such small closure times a certain portion of the pressure wave also arrives in the inner compartment I through the throughpassage closure mechanism; however, such pressure surge or pulse is diminished upon passage to such a degree by means of the slots 17 and 14 in the plates 10 and 5, respectively, that for example a filter device arranged in an expansion compartment following the air pass-age openings can no longer be damaged.
  • the closure plate 10 must be guided in the intermediate frame 3 in such a manner that it does not tend to tilt or bind even with unequal pressure loading by the pressure wave.
  • the base plate or seating portion 5, on the other hand, is effectively supported against the frame 2 by means of the flat bars 4.
  • the screws 6 essentially only serve the purpose of ensuring that the flat bars 4 can not automatically fall out of their support.
  • FIGURES 4, 5 and 6 basically difiers from the previously described embodiment in that, in this instance, a second movable seat- I 26.
  • This plate member 25 exhibits slots 27 and Webs 28 situated opposite the slots 14:: and the Webs 13a of the seating portion 5a.
  • a closure plate ltla is arranged intermediate plate member 25 and seating portion 5a which in the rest position is parall'elly spaced from both such plate member 25 and seating portion 5a.
  • This closure plate 10a is supported by the plate member 25 and the seating plate 5a through the agency of springs 11a, similar to the arrangement described in the discussion of the first embodiment.
  • the webs or legs 16a of the closure plate Illa obturate the openings in both of the other plates 25 and 5121.
  • the suction wave is intercepted by the pair of plates 25 and 10a.
  • the external movable seating plate 25 and the closure plate 1011 After fading out of the pressure wave the external movable seating plate 25 and the closure plate 1011 again return to their starting position under the action of the springs 11a.
  • the subsequent suction wave in a direction opposite to the pressure wave i.e. the shock wave impinges upon the seating portion 5a works its way through the slots 14a against the closure plate 10a and presses the same against the seating plate 25, whereby the slots 27 thereof are closed by the webs 16a and the suction wave is no longer able to travel further.
  • the movable seating plate 25 Since, as previously mentioned, the movable seating plate 25, on the one hand, is only impinged by partial components of the pressure wave, and, on the other hand, however, the suction Wave is considerably weaker than the pressure wave, the webs, or legs 28 of the seating plate 25 can be maintained considerably thinner than those of the seating portion 5a without being subjected to permanent deformation.
  • the reduced dimension of the plate 25 in accordance with the possible suction wave also reduces the mass to be moved, whereby the course of movement can be considerably accelerated.
  • FIGURE 6 the air paths during ventilation of the installation are indicated by the arrows 30a.
  • the closing-air stream in the direction of the arrow 31a and flowing through the slots 27 of the outer movable seating plate 25 is directed with large force against the webs 16a of the closure plate 10a.
  • the directed air stream from the opposite direction moves through the slots 14a of the seating plate 5a and impinge against the Webs or legs 16a of the closure plate 10a, in order to force the latter against the outer or external movable seating plate 25.
  • a plurality of circular openings 33a are provided in the plates.
  • the openings and webs respectively can, however, for example exhibit a quadratic configuration; in so doing it is sought to achieve as large as possible total cross-section of the openings in relation to the web portions. It should be understood that the replacement of the slots with individual openings can be applied in any of the embodiments herein described.
  • a tough material is employed for the closure plate which-within economic limits combines low weight with large strength, such as thin sheet steel for example. At any rate, during impact of the closure plate with the seating portion it must be prevented that pieces are punched-out or knocked-off the aforesaid closure plate. For this reason the smallest span of the openings is held as small as possible.
  • the closing time can still be favorably influenced in that, at the locations of the full or uninterrupted portions of the closure member at which impinges the air currents of the explosion wave moving through the openings of the further seating plate there are provided projections or protrusions, indicated in phantom lines in FIGURE 6 by reference numeral 50 at plate member 10a, such projections 5t extending into the openings 14a of seating portion 5a moreover, a similar effect can be reached if closure member 10:: is configured somewhat undulated.
  • Such described quick closing devices can be installed in groups at a small spacing in suitable walls or other separating and protective members. Since they advantageously can be constructed rectangular, it is possible to achieve an efiicient utilization of the available total throughpassage area approximately in comparison with circular throughpassage openings.
  • FIGURES 8, 9 and 10 A further embodiment of quick closure mechanism or device designed according to the teachings of the present invention is illustrated in FIGURES 8, 9 and 10.
  • This embodiment essentially differs from that shown in FIG- URES 4, 5 and 6 in that a movable plate-shaped element is located between two rigidly arranged plates.
  • a seating portion 30 is secured to the flat bars 4 between the inner frame 2 and intermediate frame 3.
  • this seating portion 36 exhibits a convex dome or arched portion 30a directed towards the inner compartment I, with the remainder of such seating portion being similarly constructed as previously described, in particular wit-h lengthwise openings or slots 30b.
  • a seating plate 31 connects with this arched or domeshaped plate 30 and exhibits a dome or arch portion 31a curved opposite to the seating portion 30.
  • This seating plate 31 bears with its upper and lower marginal regions, as shown in FIGURE 9, at the inside against the marginal or peripheral zone of the seating portion 30 and at the outside face against the external or outer frame 8, similar to the previously described embodiment.
  • the seating plate 31 can be manufactured to be considerably thinner than necessary for the seating portion 30 for the same reasons which were decisive for the dimensioning of the previously described external plate 25.
  • a membrane-like closure plate 33 formed of a plurality of parallelly extending elastic spring type flanges or webs 39.
  • the seating portion 30 is formed of individual webs or legs 34 which at the marginal regions are separated by intermediate members 35.
  • the seating plate 31 is likewise composed of individual webs or legs 36 separated by intermediate members 37. at the contact locations or plane of joinder the plates 31 and 30 form a transverse slot 38 in which the individual legs or webs 39 of the closure plate 33 in each case are movably arranged and aligned with the slots 3% and 31b between the webs 34 and 36 respectively.
  • the cross-section of the slot is advantageously of V-shaped configuration. A displacement of each web 39 in the lengthwise direction of the slot 38 is prevented by a respective crosspiece or web portion 40 extending transverse to the slot 38 and which engages with the relevant web 39, for which purpose the latter is provided at its ends with suitable slot means 41.
  • the plate surface and Web surfaces respectively can be coated with a preferably noncombustible dampening material, as generally indicated, at 51, in FIGURE 10. Additionally it is possible, similar to the first embodiment, to leave away the plate 31.
  • a seating portion similar to that of the first and second embodiments, in inclined position in the throughpassage opening which during normal ventilation operation encloses an angle with a closure plate. In this case, then, the closure plate is articulated at one side and is swingable against the seating portion and against the action of a counterforce.
  • closure member can be formed of rigid or elastic material, depending upon requirements.
  • individual features of one embodiment can be combined with those of another embodiment.
  • a quick closure mechanism for an air passage opening of shelters and other protective type compartments comprising at least one movable closure means mounted in the air passage opening and movable in response to the sudden differences in air pressure appearing at opposite sides of said air passage opening, stationary seating means against which said closure means sealingly bears in the closed position of said closure means, means for mounting said movable closure means so that in the absence of said pressure dilferences it normally assumes an open position, said closure means and seating means being constructed as plate-shaped elements provided with openings, at least one of said plate-shaped elements being provided with a layer of non-combustible damping material at a surface thereof partaking in a sealing action, said openings of each said plate-shaped element being separated by uninterrupted plate portions, said plateshaped closure means and said plate-shaped seating means lying against one another in said closed position of said closure means, said openings of said closure means being offset with respect to the openings of said seating means and lying in the zone of the uninterrupted plate portions of said seating means.
  • said closure means and seating means being constructed as plate-shaped elements provided with openings, said openings of each said plate-shaped element being separated by uninterrupted plate portions, said plate-shaped closure means and said plate-shaped seating means lying against one another in said closed position of said closure means, said openings of said closure means being offset with respect to the openings of said seating means and lying in the zone of the uninterrupted plate portions of said seating means, further seating means disposed at the side of said movable closure means facing away from said stationary seating means, stop means located at the side of said further seating means facing away from said movable closure means for retaining said further seating means, said further seating means being provided with openings which are offset with respect to the, openings of said closure means, at least the portion of said movable closure means provided with said openings being spaced from said stationary seating means and
  • a quick closure mechanism as defined in claim 2 wherein said further seating means is movably mounted, said stop means being stationary, said mounting means incorporating means for producing a counterforce against said further seating means which during ventilation operation maintains said further seating means against said stop means and spaced from said stationary seating means, said further seating means being displaceable in the direction of said stationary seating means in the presence of an externally emanating air pressure surge and While overcoming the action of said counterforce means.
  • said further seating means is also constructed as a plate-shaped element, said openings of said individual plate-shaped elements being numerous and approximately uniformly divided throughout the surface of the relevant plate-shaped element appearing within the peripheral portions of such plate-shaped element, the individual openings of each plate-shaped element being maintained so large with respect to the uninterrupted plate portions separating such openings such that said uninterrupted plate portions exhibit mutual contact surfaces which are just suflicient to effect a sealing action.
  • a quick closure mechanism for an air passage opening of shelters and other protective type compartments comprising at least one movable flexible closure means mounted in the air passage opening and movable in response to sudden differences in air pressure appearing at opposite sides of said air passage opening, at least one stationary seating means carrying said movable flexible closure means in a manner that in the absence of said pressure differences it normally assumes an open position, said stationary seating means having a concave surface portion facing said movable flexible closure means and defining a seat against which sealingly bears said movable flexibleclosure means in its closed position, said movable flexible closure means and seating means being constructed as plate-shaped elements provided with openings, said openings of each plate-shaped element being separated by uninterrupted plate portions, said plateshaped closure means and said plate-shaped seating means bearing against one another in said closed position of said closure means, said openings of said movable flexible closure means being oifset with respect to the openings of said stationary seating means and lying in the zone of the uninterrupted plate portions of said stationary seating means.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Mechanical Engineering (AREA)
  • Air-Flow Control Members (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Building Environments (AREA)
US359394A 1963-04-18 1964-04-13 Quick closure mechanism for the air passage openings of shelters and the like Expired - Lifetime US3301168A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH485563A CH427514A (de) 1963-04-18 1963-04-18 Schnellschlussvorrichtung an Luftdurchlassöffnungen für Schutzräume

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US3301168A true US3301168A (en) 1967-01-31

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US359394A Expired - Lifetime US3301168A (en) 1963-04-18 1964-04-13 Quick closure mechanism for the air passage openings of shelters and the like

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US (1) US3301168A (de)
AT (1) AT255087B (de)
BE (1) BE646574A (de)
CH (1) CH427514A (de)
ES (1) ES298808A1 (de)
GB (1) GB1066237A (de)
SE (1) SE302580B (de)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3363540A (en) * 1966-05-31 1968-01-16 Navy Usa Dynamic blast closure valve
US3412755A (en) * 1966-05-24 1968-11-26 Navy Usa Pressure actuated valve
US3489073A (en) * 1965-04-02 1970-01-13 Luwa Ag Pressure-tight blast valve
US3930096A (en) * 1974-04-15 1975-12-30 Deering Milliken Res Corp Composite porous fabric-impervious film article
US4253805A (en) * 1978-04-11 1981-03-03 Audi Nsu Auto Union Aktiengesellschaft Rotary compressor
US4377968A (en) * 1980-01-10 1983-03-29 Gerry Ulric K Fluid flow control means
EP0090415A1 (de) * 1982-03-29 1983-10-05 Kraftwerk Union Aktiengesellschaft Druckwellen-Schutzklappen
US4733606A (en) * 1986-05-15 1988-03-29 Temet Oy Closure device
US5968216A (en) * 1998-02-27 1999-10-19 Powell; Robert A. Security vent
US5976007A (en) * 1998-02-27 1999-11-02 Powell; Robert A. Security vent
US6371846B1 (en) 1998-02-27 2002-04-16 Security Products, Inc. Method for ventilating secure facility and system and apparatus used therefor
US20040097186A1 (en) * 2001-03-20 2004-05-20 Martin Eiselt Electrical switchgear comprising a ventilation device and ventilation device comprising two ventilation elements
US20150047860A1 (en) * 2013-08-15 2015-02-19 Flannery, Inc. Self-closing vent
US20170244226A1 (en) * 2016-02-23 2017-08-24 General Electric Company Intra-compartment cooling channel component for a metal-clad switchgear assembly
US20180306339A1 (en) * 2015-10-30 2018-10-25 Wuxi Fucare Industrial Co., Ltd Antiknock valve with both sides resisting shock wave and valve body thereof
US11073300B2 (en) 2016-09-13 2021-07-27 Beth-El Zikhron Yaaqov Industries Ltd. Blast valve utilizing an aerodynamically configured blade

Families Citing this family (5)

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Publication number Priority date Publication date Assignee Title
CH654639A5 (de) * 1982-01-18 1986-02-28 Luwa Ag Explosionsschutzventil an luftdurchlaessen, insbesondere fuer schutzraeume.
IT1216548B (it) * 1988-04-05 1990-03-08 Italarms S P A Valvola per la protezione di aperture di aerazione di ambienti in genere contro le onde generate da una esplosione.
EP0489183A1 (de) * 1990-12-03 1992-06-10 Luwa Ltd. Passives Explosionsschutzorgan
DE4238942C1 (de) * 1992-11-19 1994-01-05 Luwa Fahrzeugklimatech Gmbh Schnellschlußventil zur Anordnung an Ansaug- und Ausblasöffnungen von Belüftungsanlagen
ATE163467T1 (de) * 1994-04-21 1998-03-15 Andair Ag Schutzvorrichtung gegen druckluftstösse

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Publication number Priority date Publication date Assignee Title
US1154962A (en) * 1914-02-05 1915-09-28 Ingersoll Rand Co Flow-controlling valve for conduits.
US2000735A (en) * 1933-05-08 1935-05-07 Westinghouse Electric & Mfg Co Valve structure for compressors and pumps
US3015342A (en) * 1959-09-24 1962-01-02 Mosler Safe Co Blast closure
US3162699A (en) * 1961-02-13 1964-12-22 Robert B Sivyer Vapor liquid contacting apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1154962A (en) * 1914-02-05 1915-09-28 Ingersoll Rand Co Flow-controlling valve for conduits.
US2000735A (en) * 1933-05-08 1935-05-07 Westinghouse Electric & Mfg Co Valve structure for compressors and pumps
US3015342A (en) * 1959-09-24 1962-01-02 Mosler Safe Co Blast closure
US3162699A (en) * 1961-02-13 1964-12-22 Robert B Sivyer Vapor liquid contacting apparatus

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3489073A (en) * 1965-04-02 1970-01-13 Luwa Ag Pressure-tight blast valve
US3412755A (en) * 1966-05-24 1968-11-26 Navy Usa Pressure actuated valve
US3363540A (en) * 1966-05-31 1968-01-16 Navy Usa Dynamic blast closure valve
US3930096A (en) * 1974-04-15 1975-12-30 Deering Milliken Res Corp Composite porous fabric-impervious film article
US4253805A (en) * 1978-04-11 1981-03-03 Audi Nsu Auto Union Aktiengesellschaft Rotary compressor
US4377968A (en) * 1980-01-10 1983-03-29 Gerry Ulric K Fluid flow control means
EP0090415A1 (de) * 1982-03-29 1983-10-05 Kraftwerk Union Aktiengesellschaft Druckwellen-Schutzklappen
WO1983003462A1 (en) * 1982-03-29 1983-10-13 Mathewes, Wolfgang Protection flap device against pressure waves
US4576088A (en) * 1982-03-29 1986-03-18 Kraftwerk Union Aktiengesellschaft Pressure-wave protective flap (or damper)
US4733606A (en) * 1986-05-15 1988-03-29 Temet Oy Closure device
US5968216A (en) * 1998-02-27 1999-10-19 Powell; Robert A. Security vent
US5976007A (en) * 1998-02-27 1999-11-02 Powell; Robert A. Security vent
US6371846B1 (en) 1998-02-27 2002-04-16 Security Products, Inc. Method for ventilating secure facility and system and apparatus used therefor
USRE38121E1 (en) 1998-02-27 2003-05-20 Security Access, Inc. Security vent
US20040097186A1 (en) * 2001-03-20 2004-05-20 Martin Eiselt Electrical switchgear comprising a ventilation device and ventilation device comprising two ventilation elements
US6827643B2 (en) * 2001-03-20 2004-12-07 Siemens Aktiengesellschaft Electrical switchgear comprising a ventilation device and ventilation device comprising two ventilation elements
US20150047860A1 (en) * 2013-08-15 2015-02-19 Flannery, Inc. Self-closing vent
US10207132B2 (en) * 2013-08-15 2019-02-19 Flannery, Inc. Self-closing vent
US20180306339A1 (en) * 2015-10-30 2018-10-25 Wuxi Fucare Industrial Co., Ltd Antiknock valve with both sides resisting shock wave and valve body thereof
US20170244226A1 (en) * 2016-02-23 2017-08-24 General Electric Company Intra-compartment cooling channel component for a metal-clad switchgear assembly
US9768593B2 (en) * 2016-02-23 2017-09-19 General Electric Company Intra-compartment cooling channel component for a metal-clad switchgear assembly
US11073300B2 (en) 2016-09-13 2021-07-27 Beth-El Zikhron Yaaqov Industries Ltd. Blast valve utilizing an aerodynamically configured blade

Also Published As

Publication number Publication date
BE646574A (de) 1964-07-31
SE302580B (de) 1968-07-22
AT255087B (de) 1967-06-26
CH427514A (de) 1966-12-31
ES298808A1 (es) 1964-10-16
GB1066237A (en) 1967-04-26

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